/*******************************************************************************
 * Copyright 2010 Simon Mieth
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package cn.kkdlk.parse.dxf.generator;

import cn.kkdlk.parse.dxf.generator.conf.SAXDXFGenerationContextBuilder;
import cn.kkdlk.parse.processing.Generator;
import cn.kkdlk.parse.processing.InstanceFactory;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.Map;

public class DXFGeneratorFactory implements InstanceFactory {

    private final String DEFAULT_PROFILES_FILE = "/conf/profiles.xml";

    protected static DXFGenerationContext getDXFGenerationContext(
            InputStream in) {
        SAXDXFGenerationContextBuilder builder = new SAXDXFGenerationContextBuilder();
        return builder.buildDXFGenerationContext(in);
    }

    public static Generator createStreamGenerator(InputStream config) {

        DXFGenerationContext context = getDXFGenerationContext(config);

        DXFGenerator generator = new DXFGenerator(context);

        return generator;
    }

    public Object createInstance(Map properties) {
        final InputStream in;
        File f = new File(DEFAULT_PROFILES_FILE);

        try {
            if (f.exists()) {
                in = new FileInputStream(f);
            } else {
                in = DXFGeneratorFactory.class.getResourceAsStream(DEFAULT_PROFILES_FILE);
            }

            final Generator streamGenerator = createStreamGenerator(in);
            streamGenerator.setProperties(properties);

            return streamGenerator;
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }

}
